<template>
    <div>
      <!--面包屑-->
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>商品分类</el-breadcrumb-item>
      </el-breadcrumb>
      <!--卡片视图-->
      <el-card>
        <!--添加角色-->
        <el-row>
          <el-col>
            <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
          </el-col>
        </el-row>
        <tree-table class="tree-table" :data="cateList" :columns="columns" :selection-type="false"
        :expand-type="false" show-index index-text="#" border :show-row-hover="false">
          <!--是否有效-->
            <template slot="isok" slot-scope="scope">
              <i class="el-icon-success" v-if="scope.row.cat_deleted===false" style="color:lightgreen"></i>
              <i class="el-icon-error" v-else style="color:red"></i>
            </template>
          <!--排序-->
          <template slot="order" slot-scope="scope">
            <el-tag v-if="scope.row.cat_level===0">一级</el-tag>
            <el-tag v-else-if="scope.row.cat_level===1" type="success">二级</el-tag>
            <el-tag v-else type="warning">三级</el-tag>
          </template>
          <!--操作-->
          <template slot="opt" slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
          </template>
        </tree-table>
        <!--分页-->
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="querInfo.pagenum"
          :page-sizes="[5, 10, 20, 30]"
          :page-size="querInfo.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
        </el-pagination>
      </el-card>
      <el-dialog
        title="添加分类"
        :visible.sync="addCateDialogVisible"
        width="50%" @close="closeCateDialog">
        <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="addCateForm.cat_name"></el-input>
          </el-form-item>
          <el-form-item label="父级分类" prop="">
            <!--options指定数据源 ,props配置对象-->
            <el-cascader v-model="selectedKeys" :options="parentCateList" :props="{expandTrigger:'hover',value:'cat_id',label:'cat_name',children:'children',checkStrictly:true}"
                         @change="parentCateChanged" clearable></el-cascader>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
           <el-button @click="addCateDialogVisible = false">取 消</el-button>
           <el-button type="primary" @click="addCate">确 定</el-button>
        </span>
      </el-dialog>
    </div>
</template>

<script>
  /*安装依赖 vue-table-with*/
  export default {
    data(){
      return{
        //查询条件
        querInfo:{
          type:3,
          pagenum:1,
          pagesize:5
        },
        //商品列表
         cateList:[],
         total:'',
        //为table指定列数据
        columns: [
          {
            label:'分类名称',
            prop:'cat_name'
          },
          //type:'template'(将该列设置为模板列)，template:'isok'(设置该列模板的名称为isok)
          {
            label:'是否有效',
            type:'template',
            template:'isok'
          },
          {
            label:'排序',
            type:'template',
            template:'order'
          },
          {
            label:'操作',
            type:'template',
            template:'opt'
          }
        ],
        addCateDialogVisible:false,
        /*添加分类表单*/
        addCateForm:{
          cat_name:'',
          cat_pid:0,
          cat_level:0
        },
        addCateFormRules:{
          cat_name:[
            {required: true, message: '请输入分类名称', trigger: 'blur'}
          ]
        },
        /*父级数据列表*/
        parentCateList:[],
        /*选中的父级id数组*/
        selectedKeys:[]
      }
    },
    created () {
      this.getCateList()
    },
    methods:{
      //获取商品列表
      async getCateList(){
        const {data:res} = await this.$http.get('categories',{params : this.querInfo})
        console.log(res.data)
        if(res.meta.status !== 200 ){
          return this.$message.error('获取数据列表失败')
        }
        this.cateList = res.data.result
        this.total = res.data.total
      },
      /*分页pagesize*/
      handleSizeChange(newSize){
         this.querInfo.pagesize = newSize
         this.getCateList()
      },
      /*分页pagenum*/
      handleCurrentChange(newPage){
         this.querInfo.pagenum = newPage
         this.getCateList()
      },
      /*显示对话框*/
      showAddCateDialog(){
        //先获取父级分类的数据列表
        this.getParentCateList()
        //再展示对话框
        this.addCateDialogVisible = true
      },
      /*获取父级分类的数据列表*/
      async getParentCateList(){
          const {data:res} = await this.$http.get('categories',{params:{type:2}})
          if(res.meta.status !== 200){
            return this.$message.error('获取父级数据列表失败')
          }
          console.log(res.data)
         this.parentCateList = res.data
      },
      /*选择项发生变化触发这个函数*/
      parentCateChanged(){
        console.log(this.selectedKeys);
       /* 如果选中的父级分类不为0,父级的id值为selectedKeys长度减1的id值*/
        if(this.selectedKeys.length > 0){
          this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length-1]
          this.addCateForm.cat_level = this.selectedKeys.length
        }else{
          this.addCateForm.cat_pid = 0
          this.addCateForm.cat_level = 0
        }
      },
      /*点击确定按钮*/
      addCate(){
        this.$refs.addCateFormRef.validate(async valid=>{
          if(!valid)return
          const {data:res} = await this.$http.post('categories',this.addCateForm)
          console.log(res.meta.status);
          if(res.meta.status !== 201){
            return this.$message.error('添加分类失败')

          }

          this.$message.success('添加分类成功')
          this.getCateList()
          this.addCateDialogVisible = false
        })

      },
      closeCateDialog(){
         this.$refs.addCateFormRef.resetFields()
         this.selectedKeys = []
         this.addCateForm.cat_level = 0
         this.addCateForm.cat_pid = 0
      }
    }
  }
</script>

<style lang="less" scoped>
  .tree-table{
    margin-top: 15px;
  }
  .el-cascader{
    width: 100%;
  }
</style>
